Method of and apparatus for winding coils in pairs with a continuous strand of wire



Jan. 19, 1954 FIG. I

' Filed Nov. 2, 1949 J. H. BIEG METHOD OF AND APPARATUS FOR WINDING COILS IN PAIRS WITH A CONTINUOUS STRAND OF WIRE a sheets-sheet 1 ,t") lO INVENTOR.

JOHN H. BIEG ATTORNEY Jan. 19, 1954 J B|EG 2,666,592

METHOD OF AND APPARATUS FOR WINDING COILS IN PAIRS WITH A CONTINUOUS STRAND OF WIRE Filed Nov. 2, 1949 3 Sheets-Sheet 2 I JNVENTOR. JOHN H. BIEG ATTORNEY Jan. 19, 1954 J. H. BIEG 2,666,592

METHOD OF AND APPARATUS FOR WINDING cons IN PAIRS WITH A CONTINUOUS STRAND OF WIRE 3 Sheets-Sheet 5 Filed NOV.-. 2, 1949 FIG. 4

INVENTOR. JOHN H. BIEG FIG. 5

ATTORNEY Patented Jan. 19, 1954 2,666,592 METHOD 01? AND, APPARATUS FOR WIND- GOILS PAIRS WITH A CONTINU; O STRAND'QF- WIRE John. H li ei hica L,

essig or t t matte Electric Laboratories, Inc., Chicago, 111.,

a corporation of Delaware e-anon November 2, 1949, Serial No. 125,123 (01.2 12 9) 5 C aims- This invention relates in general to coil winding and more particularly to apparatus for and a method of winding telephone receiver" coils in pairs.' v Heretofore coils, to be used in pairs, and particularly telephone receiver coils were wound individually and then spliced.

Many other considerations complicated the equipment and the process. *In order'for coils" to aid'one another when used in' pairs, their windings must be opposing one anotherto produce opposite polarity. To obtain this result, a run of coils had'to be made winding all ofthem'in one direction, and then the machine reversed fora run with opposite windings.

Then they were paired and spliced. 1

Due to the fine enameled wire generally used splicing was difficult. And even when satisfactorily achieved, the operation which includes removing the insulation, the'twisting and soldering so weakened the wire on eithersideof the splice that very'little subsequent handling caused them to break, necessitating repetition of the splicing which is time consuming and'cos'tlyn The present invention overcomes these deficiencies' by providing means" for winding the coils in pairs with a continuous strand so that no splicing and subsequent weakening of the wire need occur. Fronia production cost standpoint alone, the advantages are great. An ancillary'a'dvantage in performance of the finished coils is also derived in that the single strandpermits uniform current flow, Whereas previously, increased resistance occurred at the splice, which is wholly eliminated in'the present invention.

An object of theinvention therefor is'to provide apparatusQfor winding coils in pairs with one continuousstand of wire Another object of the invention is to provide a new method of winding-'coilsin pairs with one continuous strandofjwire employing the aforementioned apparatus. Still another object of th invention in keeping with the above listed objects is't'o providech eaper better isets of "telephone receiver coils. A f ature of thein'vention lies'in the eliminationo f'thesplicing operation, which was eretof'or'e necessary as the coils were indivi ually wound, and later pairedup.

b h f re n kee n .w thp e ab e s nedf se ure' is h i a on o he po sibility for the connection between the paired coils to break in handling dueto a weakness inherentin the, splicing operation. s i 59m amber featur of t e inten on lies in. the more. unif rm l t al urrent ow ossible through both coils due to the uniform con.-

nection of the windings.

Another feature of the invention has in th 7 method of winding in pairs and placing the finished products in special trays to further eliminate possibility of breakage in handling, testing, inspection and storing the coils.

These and other objects and features will be come a p nt upon an ex mination of the accompanying drawings in conjunction with the following specification wherein like symbols are utilized to designate like parts.

The drawings comprise Figures 1 to 5 in which;

Fig. l is an exploded view of the invention showing a chuck head stock, collar, winding arbor and cap.

Fig. 2 is a detailed exploded viewof the Winding arbor itself and in conjunction therewith, the base and core elements upon which the windings are to be wound.

Fig. 3 is an end view of the winding arbor with the pair. of coil frames to be wound attached ready for insertion into the chuck and subsequent application of a continuous strand of wire thereto.

Fig. 4 is an oblique view of the special tray for holding the coils in pairs whenfinished,

Fig. 5 is a cut away top view of part of one of the strips forming the tray bottom and showing how a pair of coils are placed therein'after wind.- ing.

Briefly the invention comprises a winding arbor, chuckand method foremploying them for 7 making possible the winding of coils in pairs from a continuous strand. The particular embodiment of the arbor, shown herein, is adapted to winding coils for telephone receivers in pairs on a pair of coil frames of the type substantially'as shown in Fig. 3 of Patent No. 2,205,669, issued to Pye, dated June 25, 1940. The inventor however doesnot want to limit himselflto this specific embodiment.

The arbor is so eonstru'cted'as to clamp tightly and hold in place two coil frames, the core per tions of which areheld 99 apart, while the arbor itself is rotatable.

The arbor is then inserted into a speciallybuilt huck so that th ax s o the r y s perpe dicular tothe axis of rotation of the chuck. vThe arboris inserted so that one of the cores of coil frames extends beyond the chuck along the axis of rotation thereof. Although tightly lamp d i ch p itio or app in th nd ng to the f rst coilframefthechuck'is s'ocoristructd that when the first coil is woundand the machine may be manipulated to perrotated 90 so that the core of the second frame lies along the axis of rotation of the chuck. Here the chuck is again manipulated to clamp the arbor in position and the winding of the second coil is completed in this position with one continuous strand of wire. When the second winding is completed, the chuck may again be manipulated to permit withdrawal of the arbor and the completed pair of integrally connected coils secured thereto.

The arbor clamp is released and the completed pair of coils removed and placed in a special tray. This tray has several strips for a base with diagonally cut spaced slots to hold the pairs and minimize handling, as shown in Figs. 4 and 5.

The arbor may now again be refitted with two more coil frames, the clamp thereon holding them in proper angular position one to the other, and replaced in the chuck for winding.

Having briefly set forth the invention, a detailed description follows.

The winding arbor i is made from any suitable metal such as brass or steel and is basically a length of rod 2 with reduced flat surfaces 3 on both ends thereof. The rod 2 may have any number of sides as the particular type of coil frame to be wound will necessitate, but in all cases two sides 5 onto which the coil frames to be wound are mounted must be at right angles to one another. The particular embodiment shown is six sided with two opposite edges being common to 2 pairs of sides, the sides in each pair being at right angles to each other. This is only necessary because in the particular case, the coil frames to be wound had bases with two edges at right angles, the purpose for which is also shown in the patent referred to earlier herein and of no direct bearing on the present invention. The two coil mounting sides 5 of arbor rod 2, which must be at right angles to one another, have guide studs 4 for properly setting the coil frames 6 in place on mounting sides 5. The coil frames 6 are therefore provided with guide holes 6a to set over the guide studs 4.

Between the two perpendicular mounting sides 5 will be either another side 5a or a common edge depending upon the total number of sides desired.

Into this side 5a or common edge are bored three holes. Into the center of this side or edge is bored hole i, the axis of which is perpendicular to the lengthwise axis of the arbor and 45 between the two mounting sides. Hole l extends through the arbor. On either side of hole "I are guide holes 8 which do not extend completely through the arbor. Into the bases of holes 8 are set the coil springs 9.

A coil frame clamping member It, having a screw stem H and guide studs I2 to fit into holes l and 8 respectively, lies parallel to the common edge or in between side 5a of the mounting sides 5. A knurled nut l3 serves to draw the clamping member toward the common edge. The two ends of the clamping member is have side projections [4 which fit over the edges of coil frames 6 when the clamping member is drawn in toward the arbor. When the clamping member is so drawn in by nut 13, projections 14 in conjunction with studs 4 hold the coil frames tightly to the arbor. The particular embodiment shown herein has an additional clamping member l5 interposed between nut l3 and the arbor. This additional clamping member was used because of the L shaped bases of the coil frames is stopped, the chuck mit the arbor to be 4 shown in the patent referred to. This member [5 has springs H to aid in the clamping.

The chuck into which the winding arbor just described is fitted comprises chiefly three parts, a hollow spindle la, a retaining collar l9 and a locking nut 20.

The spindle member I8 is substantially cylindrical and hollow. At one end it has an extension 2| which has a center bore 22 to accept a shaft for rotating the chuck. To fixedly hold the chuck to the shaft, set screw 23 is provided. The other end, which is hollowed out, has a nar row flat circular surface 24, in a plane perpendicular to the axis of rotation thereof, formed by the end of the cylindrical wall inclosing the hollow 25 therewithin. The outer surface of the hollowed end is threaded. Into surface 24, directly across from one another, are out two right angled notches 26, the vertexes of which lie on a line normal to the axis of the spindle member i8. Two additional recesses 21, directly across from one another and midway between notches 26 are cut in the inner surface of the cylindrical wall. The octagonally surfaced ends 3 of arbor I fit into the angular notches 26. The recesses 21 permit the arbor with coil frames attached to be rotated along the lengthwise axis of the arbor which when in place in notches 26 is transverse to the axis of rotation of the chuck.

Retaining collar l9 threaded within is then screwed over the hollow end of the hollow spindle member 18 until its forward rim 28 engages surfaces of the octagonal ends of the arbor. The arbor is now fixedly held in place, two surfaces of each end bearing against the sides of right angled notches 26 while the retaining collar engages two other surfaces of octagonal ends 3 thereby holding it fixed in a three surface vicelike grip at each end. Lock nut 29 is then turned on the threaded spindle surface to engage the retaining collar thereby locking it in place.

To be in proper position for winding, the arbor with coil frames 6 attached is placed into the chuck as just explained in such a manner that one of the frames extends beyond the retaining collar [9 and along the axis of rotation of the chuck while the other frame 6 is enclosed within the hollow portion 25 0f the chuck at an angle of from the frame projecting beyond the collar.

Wire is then wound on the projecting frame by applying it from a spool over conventional bobbins to the coil frame 6 while the chuck is being rotated.

When the first coil is wound, rotation of the chuck is stopped and the lock nut and retaining collar loosened. The arbor is then rotated along its lengthwise axis 90 so that the second frame now projects beyond the collar and along the axis of rotation in position to be wound while the coil just wound is thereby rotated within the hollow spindle member. Collar l9 and nut nut 20 are again tightened as before.

The same strand of unbroken wire is now applied to the second frame as the chuck is rotated in a reverse direction from that used to wind the first coil. In this manner, the coils of the pair will have reverse polarity, the necessity for which is obvious.

When both coils have been so wound, the rotation of the chuck is again stopped and the lock nut and collar loosened. To remove the arbor, the retaining collar l9 need only be turned until slots 29 in its forward rim 28 are immediately over notches 26. The arbor may then'be lifted out through these slots without removing the enmembers I 0 and 15 away from said arbor, and

permitting their removal from studs 4.

Fresh coil frames are attached and the arbor is replaced in reverse order from its withdrawal, namely through slots 29 and is clamped again into recesses 26 by the retaining collar and lock nut as explained hereinbefore, with one frame extending therebeyond along the axis of rotation.

Another pair of coils may now be wound.

To further minimize handling and consequent breakage of the wire joining the pairs, a special tray 30 is used. This tray has for its base a number of strips 3|, each strip about as wide as one of the coil frames to be held thereby. The strips are made to have parallel pairs of diagonal slots 32 cut into one surface of the strips. These pairs of diagonal slots are spaced apart the width of a pair of the receiver coils and the slots in the pairs themselves are spaced apart sufliciently to permit the pairs of coils to be easily placed therein by holding them with thumb and forefinger. The strips 3| in the tray are separated by narrow strips 33.

In this manner the coils may be inspected, tested and stored without further handling and thereby this is an integral step in the method for manufacturing coils in pairs from a continuous strand of wire.

Having described the invention in detail, what I claim and desire to have protectedby issuance of Letters Patent of the United States is:

1. In a coil winding device for winding coils on to a plurality of separate and independent cores with a continuous strand of wire, a rQtatable chuck having notches in its outer end, an arbor, the ends of said arbor shaped to fit into said notches in a number of rotated positions of said arbor about its longitudinal axis, a plurality of separate and independent coil cores, means for clamping said cores onto said arbor with the longitudinal axes of said cores perpendicular to the longitudinal axis of said arbor, means for selectively securing said arbor to said chuck with the ends of said arbor locked to said chuck in said notches in any one of said number of rotated positions of said arbor about its longitudinal axis and with the longitudinal axis of said arbor normal to the axis of rotation of said chuck so that the axis of rotation of said chuck for winding another of said cores.

2. In a coil winding device as claimed in claim 1, in which said arbor comprises a multi-sided rod and said coil core clamping means includes a manually operable clamp mounted on said rod, said clamp operable to clamp said coil cores to said rod so that the longitudinal axes of said coil cores arenormal to the longitudinal axis of said rod.

3. In a coil winding device as claimed in claim 2, in which said'chuck has one element which is circular and male threaded and a collar having threads complementary to the threads of said element, and also has a locking nut threaded on to said element for engaging said collar and looking it in place, said collar having an inwardly extending flange at one end thereof such that when said collar is threaded on to said element with said arbor ends positioned in said chuck notches, said flange will engage said arbor ends and lock said arbor in place.

4. In a coil winding device as claimed inclaim 3, said collar has a pair of slots through said flange thereof, on a line normal to the axis of said collar,

said collar rotatable to bring said slots into alignment with said arbor ends to permit removal and replacement of said arbor.

5. The method of applying a winding to a pair of separate and independent coil cores which consists in mounting said cores on a rotatable mandrel, mounting said mandrel on a rotatable device in such a manner that one core is in position such that it is rotated about its longitudinal axis as the mandrel is rotated and the other is rotated selectively one of said cores can be positioned with 7 its longitudinal axis coincident with the axis of rotation of said chuck for winding said positioned core and so that another of said cores can be positioned with its longitudinal axis coincident with about an axis other than its longitudinal axis, and applying the winding to said one core from a strand of wire as said mandrel is rotated, in then stopping the mandrel and shifting the position of said mandrel on said'device without removing the cores therefrom, so that the other core rotates about its longitudinal axis and the said one core rotates about an axis other than its longitudinal axis and in then applying a winding to said other core from the same continuous strand of wire as said mandrel is again rotated.

JOHN H. BIEG.

References Cited in the file of this patent UNITED STATES PATENTS Hilsinger Nov. 16, 1948 

